bhelsea15
12.02.2021 •
Mathematics
Solve for x.
6
-10
7
-9
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Ответ:
x=7
Step-by-step explanation:
The triangle is right angled meaning that one of the angles is 90⁰.
90+30+(9x-3)=180 (Angle sum property of a triangle)
120+9x-3=180
9x-3=180-120
9x-3=60
9x=60+3
x=63/9
x=7
The angle will be (9×7)-3=60⁰
Ответ: